@mixin popper($arrow, $arrow-width, $arrow-distance, $bg){
    display: block;
    visibility: visible;
    font-size: $font-size-small;
    line-height: $line-height-base;
    position: absolute;
    z-index: $zindex-tooltip;

    &[x-placement^="top"] {
        padding: $arrow-width 0 $arrow-distance 0;
    }
    &[x-placement^="right"] {
        padding: 0 $arrow-width 0 $arrow-distance;
    }
    &[x-placement^="bottom"] {
        padding: $arrow-distance 0 $arrow-width 0;
    }
    &[x-placement^="left"] {
        padding: 0 $arrow-distance 0 $arrow-width;
    }

    &[x-placement^="top"] .#{$arrow} {
        bottom: $arrow-distance - $arrow-width;
        border-width: $arrow-width $arrow-width 0;
        border-top-color: $bg;
    }
    &[x-placement="top"] .#{$arrow} {
        left: 50%;
        margin-left: -$arrow-width;
    }
    &[x-placement="top-start"] .#{$arrow} {
        left: 16px;
    }
    &[x-placement="top-end"] .#{$arrow} {
        right: 16px;
    }

    &[x-placement^="right"] .#{$arrow} {
        left: $arrow-distance - $arrow-width;
        border-width: $arrow-width $arrow-width $arrow-width 0;
        border-right-color: $bg;
    }
    &[x-placement="right"] .#{$arrow} {
        top: 50%;
        margin-top: -$arrow-width;
    }
    &[x-placement="right-start"] .#{$arrow} {
        top: 8px;
    }
    &[x-placement="right-end"] .#{$arrow} {
        bottom: 8px;
    }

    &[x-placement^="left"] .#{$arrow} {
        right: $arrow-distance - $arrow-width;
        border-width: $arrow-width 0 $arrow-width $arrow-width;
        border-left-color: $bg;
    }
    &[x-placement="left"] .#{$arrow} {
        top: 50%;
        margin-top: -$arrow-width;
    }
    &[x-placement="left-start"] .#{$arrow} {
        top: 8px;
    }
    &[x-placement="left-end"] .#{$arrow} {
        bottom: 8px;
    }

    &[x-placement^="bottom"] .#{$arrow} {
        top: $arrow-distance - $arrow-width;
        border-width: 0 $arrow-width $arrow-width;
        border-bottom-color: $bg;
    }
    &[x-placement="bottom"] .#{$arrow} {
        left: 50%;
        margin-left: -$arrow-width;
    }
    &[x-placement="bottom-start"] .#{$arrow} {
        left: 16px;
    }
    &[x-placement="bottom-end"] .#{$arrow} {
        right: 16px;
    }
}